Drainage part 5

What is the main vertical pipe in a plumbing system that allows the release of gases and prevents the build-up of pressure?

• Branch pipe

• Soil vent pipe (SVP)

• Drain pipe

• Overflow pipe

Which pipe connects to the main vertical pipe in a plumbing system to carry waste from fixtures?

• Overflow pipe

• Soil vent pipe (SVP)

• Branch pipe

• Supply pipe

What causes wavering in trap seal loss?

• Discharge of water down the main soil stack

• Wind passing over the top of the ventilation pipe

• Discharge of water from another appliance connected to the same branch

• A plug of water forming negative pressure in the pipe

What is the cause of compression in trap seal loss?

• Wind passing over the top of the ventilation pipe

• Discharge of water down the main soil stack

• Discharge of water from another appliance connected to the same branch

• A plug of water forming negative pressure in the pipe

Induced siphonage in trap seal loss is caused by:

• Wind passing over the top of the ventilation pipe

• Discharge of water down the main soil stack

• Discharge of water from another appliance connected to the same branch

• A plug of water forming negative pressure in the pipe

Where is self siphonage most common in trap seal loss?

• Ventilation pipes

• Main soil stack

• Washbasins

• Connected branches

Which of the following is a cause of trap seal loss due to momentum?

• Heatwave

• Pouring a bucket of water away

• Thread of material becoming lodged

• Capillary action

What causes natural seal loss in a trap seal?

• Pouring a bucket of water away

• Thread of material becoming lodged

• Heatwave

• Capillary action

In which type of trap is capillary action most likely to cause trap seal loss?

• P trap

• U trap

• S trap

• J trap

What happens when a thread of material becomes lodged in a trap?

• Water evaporates

• Water is drawn from the trap by capillary action

• The trap seal is removed by force of water

• The trap seal is unaffected